Reversible coil winding mechanism for stator winding machines



FIG. I

June 1953 T. F. HARVEY 2,640,652

REVERSIBLE COIL WINDING MECHANISM FOR STATOR WINDING MACHINES FiledSept. 23, 1949 2 Sheets-Sheet 1 INVENTOR: THADDEUS F. HARVEY.

ATT'YS June 1953 T. F. HARVEY 2,640,652

REVERSIBLE COIL WINDING MECHANISM FOR STATOR WINDING MACHINES FiledSept. 23, 1949 2 Sheets-Sheet 2 7- M, will! HUHH I 5a 51 8+ M M 20/, a j52 I? '9 n n: 60 g/ i I v-n a I 2: 7

.- VIIIIIIII INVENTOR: THADDEUS F. HARVEY ATT'YS Patented June 2, 1953REVERSIBLE COIL WINDING MECHANISM FOR STATOR WINDING MACHINES ThaddeusF. Harvey, South Bend, Ind.

Application September 23, 1949, Serial No. 117,343

9 Claims.

1 This invention relates to stator winding machines and particularly toimprovements in the operating mechanism for the wire carrying, coilwinding, component of the winding machine whereby alternate coils orpoles may be wound interruption of the primary driving mechanism of thewinding machine, or of the normal operation of the other mechanicalcomponents thereof.

Other principal objects of this invention are to provide a simple andpositive means to control the action of a wire gun to effect reversal ofwinding direction; to provide such means that will reverse the windingdirection of successive coils without interruption of the associatedspan control mechanism; to provide such means that will not affect theaccuracy of the span control mechanism; to provide such means that maybe readily and accurately controlled and timed for :any predeterminednumber of turns in the coil windings; to provide such means that may be:accurately coordinated with automatic fixture -:indexing means forcontinuous operation of the winding machine to wind a complete stator;and 'to provide an improved method of reverse winding alternate coils orpoles of the stator of an.

electric machine.

A specific embodiment of this invention is shown in the accompanyingdrawings in which:

- Figure 1 is a schematic plan View of the wire gun and fixture indexingcomponents of a stator winding machine embodying my invention.

Fig. 2 is a diagrammatic end view of a four 4 pole stator illustratingthe alternate relation of 'the pole windings and the paths that must befollowed by the wire guide fingers of the wire gun.

Fig. 3 is a diagrammatic plan view showing the pole windings indeveloped relation and illustrating the reverse winding of alternatepoles.

Fig. 4 is a diagrammatic View showing the path I of a wire gun fingerduring two cycles of the winding machine operation and illustrating themanner in which reversal of winding direction is accomplished. Y Fig. 5is a plan view of the reversing mecha-- shaft 2 and into the head I.

2 nism as embodied in the wire gun stroke drive of a stator windingmachine.

Fig. 6 is a sectional view of the same as taken on line 66 of Fig. 5.

Fig. '7 is an end view of the same as taken 0 line I1 of Fig. (if, and

Fig. 8 is another end view of the same as taken on line 88 of Fig. 5 andshowing the driving connection between the wind reversing mechanism andits actuating means.

The wire gun or coil winding component of a stator winding machine, asillustrated in Fig. 1, and in which the present invention is embodied,is substantially the same as that described in my Patent No. 2,542,515issued February 20, 1951,

'for Intermittent Movement Mechanism, which application particularlydescribes and claims an improved means for actuating and controlling thespan operation of the wire gun. The present invention is concerned withan improved means for actuating and controlling the stroke operation ofthe wire gun whereby the direction of winding of alternate coils, orpoles, of a stator is automatically reversed while the winding machineis in continuous operation and without interruption of the normalfunctions of the several components of the machine.

In the form shown in Fig. 1 the wire gun comprises a cylindrical head Imounted on a reciprocable hollow shaft 2 which is slidably keyed withina hollow carrier tube 3. The carrier tube 3 is rotatably mounted infixed end bearings 4 and 5 and serves as the main support for the wiregun mechanism and the means for imparting the span movement to the headI. s

As shown the head I carries a pair of opposed radial fingers 6 and I,which are reciprocably mounted in the head and which serve as leadersfor the wire strands, with which the coils or windings of the stator areformed, and these fingers are actuated by a hollow finger control rod 8which extends through the entire length ofthe The wire strands 9, onefor each of the fingers 6 and I, are led to the head I through thehollow finger-control rod 8 and emerge from the head I by way of theradial fingers 6 and I, as will be readily understood by those skilledin this art.

The wire gun head I is of a size to pass through the core, or centralopening, of a stator, not shown, fixedly mounted in a suitable fixtureI0,

" which in turn may be rotatably mounted for indexing the stator inrelation to the fingers 6 and spaced coils. Details of the :headconstruction and the means for radialy reciprocating the fingers 6 andl, to project them from the head and withdraw them into the head, arenot shown since they are not a part of the present invention and meansfor accomplishing that purpose are well known in the art. It will beunderstood, however, that operation of the fingers is accomplishedthrough reciprocation of the finger-control rod8 within andindependently of :the hollow head shaft 2.

As shown in Fig. 2 the stator is formed with .a plurality of angularlyspaced axially extending slots within which the turns of wire, making upthe respective pole coils, are laid .1and .it is :the function of thewire gun I to lead the wire along one slot during a stroke through thestator, turn angularly through a predetermined span :distance intofinger alignment with anotherslot, make a second or return strokethrough'the stator, and then turn angularly through the span distance toalign the respectivefinger with the first slot. Thiscomprises one cycleof winding machine operation and the cyolejis repeated for as many timesas there are to he turns in ,the

coilbeing formed.

During this cycle of operation thefingers 8 and flareretracted duringthe stroke, or passage of 'thelheadl'l throughthe stator, and areextended or radially projeotedatjthc end of each stroke Hand-during thespan. or angular turning period. Thus thewireis laidalongthe slotopening dur- .ing ,the stroke of the wire gun and is bottomed inthe,.slot,,and, lead through the span distance to .thereturn .s1ot,during the span movement of the wire, gun. ,-The vstrokeaction ofthewireglm, in thetarrangementshown, iscontinuous, in simple harmonicmotion, and the extension and'retractionof the fingers Sand '1', as wellas-the span rnovement, occur during 'theend period of each strokaza thead! has passedthr u hth stat. :nS indicated in the diagrampf Fig. 4.Thus the stroke operation of the :wire gun, the operation. of. the -wireguide-fingers ,5 and 1?, and rthespanmovement. mustall he in precisely.timed relation witheach other.

As shownuin'Fig. 1 thevstroke. operation of :=the -wir.e:gun.headzil anditsishafti2 isiobtained by -means'ofa crank H, .which, through aconnecting "rod 12, reciprocates -a-carriage -l 3 mounted to-sli'dealong appropriate-ways M (only one of the ways being shown).The-carriage 43 has -a bearing l-5 -mounted fixedly thereon and -the"hollow w-ire gun shaft iextends-through and is journaled'in-thebearing-l5. The: shaft 2'is fas- -tened against axial "movement in"thebearing (-5 "-bymeans of suitable lock collars secured to *the shafti-at each-end of the bearing. ,Thus, though the-shaft? is rotatable inthe bearing I'5, the-bearing, as it reciprocates with the carriage -'I3,tcarries the shaft and ,causes it to reciprocate "to the same extent.

"In the form shown the .crank pin [Bis shift- "able... radially along ,a.T. slot formedintheface Of the mm .wheel H, and thereby the length.ofthe connecting rod stroke, and hence the stroke of the wiregun-shaftfi, maybe varied toraccom- ,.,-modate stators v,cf -different,lengths. Such an iarrap ement of the-crank is an,oldrpracticezand .itwill.,be..understood that the-crank;-pin It -is arranged-tobesecuredfast in, any position itrnav she set.

Rotation .ofthercrank I l,,is -obtained through a .\-Dair,of.,bevel,,gears I I sand-.- l8,rrnoun e respeccompleted. als driven;frQmfihe-ma tively on the crank shaft l9 and an extension 20 of a driveshaft 2!, the drive shaft 2! receiving its power through a chain ofgears 22, 23 and 24 from a main power shaft 25. The power shaft 25drives all of the several operating components of the stator windingmachine and in this mannor the timing of the several components, inrelation to each other, is maintained.

In the i'fo m of t anpar n eh wn in Fig. 1, the span operation of'thewire gun is accomplished by oscillation of the carrier tube 3 atpredetermined intervals and is efiected by means ,of.a,.-rack';26,,.operating in suitable guides, which coact with a ringgear 2'! mounted fast on the carrier tube 3. The rack 26 is reciprocatedby a connecting rod 28 which in turn may be driven by-a. span-controlmechanism, not shown, such as that .,described in my before mentionedPatent No. 2,542,515.

In the form shown in Fig. 1 the means for reciprocatingthefinger-control rods ismounted .directlyon the carriage 53, since initsoperation the control rods is moved axially relative to the wire gunshaft 'Zand must travel with theshaft 2 as the latter ,refiiprocates tocause the strokeqperation of the wire gun head I. ,As shown the controlrod actuating means comprises a tail piece .29 mountedontherearend ofthe.cpntrol rod 8 and havin rack teeth, the eon which mesh with .agear3.!) mountedonashaft 3 i journaled on the carriage l3. The; sha ft 3lcarriesa second gear .32 .whichinturn is meshed witha rack bar 33slidablymounted in suitable, fixed shown, from the main powerzshaft 25or itsppwer .As shown th mecha i m v1501? .ninderihe :th statonfixture.110, to. th .01 1? @01 ,D thestator when the :winding pf one set ,ofpoles 'P WQ In this case, sincethapperation is shaft 25.

; inter.mitten th d vin ;.pow.er s transmit throu h anautom ti qclutchieien@d,t tum throu :onlyn :predete mined raneu e ext upo ;3 .h..Ql .I Qtheclutc zzhem ven rate at predetermin d i tervalsaccordineto thenumberof m ch-m crc ea r complet w nl in zturns, desiredtfor each 31 9 8 19fthe stato tha c .3B;-drv await- 9 on whicl a; sca e i m un ed. The e 4hemr r re a :..t nri ;c2 car which terminates in a gear 4| which isdirectly m he wi h a suitabl rin gear, 1 n shown,

.pole of the stator.

The automatic clutch 38, above mentioned is a common device -known, inthe; art-as; a singleturn or single revolution clutch. Ordinarily, thisclutch is controlled by a trip lever, not shown, mounted beside theclutch and designed to contact a step on an annular trip cam whichrotates with the intermittently driven clutch member. Engagement of thetrip lever with the cam step renders the clutch inoperative; and releaseof the trip lever causes automatic and instantaneous driving connectionof the clutch parts. A single step on the trip cam of this clutch willpermit a single full revolution of the intermittent clutch members, ormultiples of one revolution through control of the trip lever; andmultiple steps on the trip cam will permit fractional revolution of theintermitent member according to the angular disposition of the trip camsteps.

As is well known in the art, the operation of the trip lever may be bymechanical means, or electrically as by a solenoid, and such operationmay be controlled by any suitable timing or counting mechanism,positively driven by the winding machine, which will act upon completionof a predetermined number of cycles of machine operation. Such a timingmeans is not herein shown and described since no invention is claimedfor the same and any of several known types and arrangements of suitablecontrol devices may be readily employed for the desired purpose.

For example, the cycle or turn counting means disclosed in Patent No.2,445,937 issued July 27, 1948 to D. E. Carpenter, to which reference ismade for details of its construction and operation, may be readilyadapted for use with the present machine.

Fig. 3 shows the direction of the winding turns for a four pole stator,in which each pole is wound with two coils, and Fig. 2 shows the angularrelationship of the several coils. Since the wire gun is provided withthe two diametrically opposite wire guide fingers 6 and I, the devicewill simultaneously wind two diametrically opposite stator poles: and,as shown in Fig. 2, each coil occupies two stator slots located oneither side of a center slot which is the pole core. In the diagram ofFig. 2, the letters at the center represent the pole numbers and theindices in the stator slots indicate the respective slots for the firstand second coilof each pole, the zero indicating the pole center. Theletters E and .L indicate the slots over which the wire gun fingers passwhen the wire gun enters the stator on the first stroke of the windingcycle and when the wire gun leaves the stator on the second stroke,respectively. It is the function of the wire gun to lay the winding wirein the respective coil slot during each stroke and to make the spanbetween the slots at the end of each stroke so that a complete turn willbe formed around the respective pole during each cycle of windingmachine operation.

The change of the span distance for the first or inner coil, of eachpole and the second, or outer coil, is performed automatically by thespan control mechanism, operating the rack 26, upon the completion ofeach coil winding. The span change mechanism, itself, is not a part ofthe present invention and is not herein shown. It is, however, fullydescribed in my before mentioned Patent No. 2,542,515.

It will now be seen that upon completion of the windin of the second orouter coils, of the poles A and C, which are wound simultaneously, theangular relationship of the wire gun and the stator must be changed toeffect winding of the coils for the poles B and D. In the embodiment ofthis invention herein shown, this change of angular relationship isaccomplished by rotating, or indexing, the fixture ID, in which thestator is held, through a turn of 90, or a sufficient angular distanceabout its axis to locate the poles B and D at the positions formerlyheld by the poles A and C. This is accomplished automatically, at theproper time, by the indexing mechanism actuated by the clutch 38, andthe indexing distance and direction is indicated by the peripheral linesand arrows in Fig. 2.

It will now be seen from Fig. 2 that at the start of the windingoperation the wire gun finers will lay a wire in slot IE, of coils A andC, during the first, or entering, stroke; span the distance betweenslots IE and IL at the end of the first stroke; lay the wire in slot ILduring the second, or leaving, stroke; and finally span the distancebetween IL and IE at the end of the second stroke to complete oneoperation cycle or one coil turn. When the first or inner coils of polesA and C are completed, with the required number of wire turns, the spanchange mechanism automatically alters the span distance during the lastspan movement and the wire is laid in slots 2E and 2L, in the samemanner as in the case of the first pair of slots.

When the winding of the second, or outer coils, of poles A and C arecompleted the wire gunstator relationship is changed automatically bythe indexing mechanism and the winding of poles B and D is begun, thespan change mechanism having in the meantime altered the span distanceto the angular spacing of slots IE and IL. In the case of poles B and D,however, the coils must be wound in the opposite direction than that ofthe windings of poles A and C, and it is at this point in the windingmachine operation that the reversal of the sequence of wire gunmovements takes place.

It is one of the purposes of this invention to eiTect automatic reversalof the wire gun movements without interruption of the normal operationsof the winding machine as a whole, and in the present embodiment of theinvention this is accomplished by mechanically absorbing the last strokein the sequence of wire gun movements, occurring in the final windingcycle for the outer coil of the first pair of poles. In other words adwell or pause is caused, in the reciprocating motion of the wire gun,for a period equivalent to one-half of its normal operating cycle. Aspan movement occurs at the beginning and end of this period of dwell orpause in the stroke operation of the wire gun and, during the secondspan movement, the span distance is changed from that of the outer coilto that of the inner coil; and simultaneously, the angular relation ofthe wire gun and the stator is changed to cause the next pair of polesto be wound. The windings, however, for the second pair of coils will bemade in the reverse direction because of the lost stroke between twospan movements and, as shown in Fig. 2, the next stroke will lay thewinding wires in the slots for the inner coils of poles B and D in thedirection opposite that for the corresponding slots of poles A and C.

This reversing action of the wire gunis illustrated graphically inFig. 4wherein the dotted circle represents the cycle of the wire gun operationand the solid line represents the path of one of the wire leadingfingers of the wire gun. The diameter of the circle represents the totalstroke :29 the angular distance of rotation of the bracket 6|, andaccording to the direction in which the bracket 6| is turned. Thus, ifthe bracket BI is rotated in the same direction that the shaft 2| isturning, the-shaft 20 will be relatively retarded;

and if the angular extent of rotation of the bracket BI is 90 the shaft20 will be retarded-90 relative to the shaft 2i. Since the ratioof thegears I8 and I! is 2 to 1, 90 retardation of the gear l8 will result in180 retardation of the gear l1, and alike retardation of the crank I I,relative to the drive shaft 2|. By rotating the bracket 6| through 90angularly and at a speed equivalent to one-half the speed of the shaft2!, the period of retardation will be equal to the time for one-halfrevolution of ,the shaft 2|. It is by this means that the crank l I,which normally revolves at the same speed as the shaft 2|, is retardedor stopped for one-half revolution to produce the dwell or pause in thestroke operation of the wire gun.

As before mentioned, the means for actuating the bracket arm SI of theepicyclic mechanism comprises an air cylinder 49 which is actuated by asource of compressed air, not shown, and the rate of operation of whichis controlled by suitable speed control air valves, also not shown.Speed control air valves are well known-devices which restrict the airflow in one direction only and are used to regulate the bleed-off ratefrom the air cylinder, on the side opposite that to which drivingpressure is applied, so as to control the speed of piston movement inthe air cylinder. The air cylinder 49 operates the rack 48 which iscarried on the end of the air cylinder piston rod, and as shown in Figs.5 to 8 inclusive, the rack 48 drives a gear 41 which is directlyconnected to and on the same axis as a gear 65, the supporting shaftsfor the gears 41 and 65 being suitably mounted on a side wall of thecasing 5i]. The gear 65 drives a pinion 66 mounted fast on a cross shaft6! which in turncarries the worm 45. Thus, actuation of the rack 48 bymeans of the air cylinder 49 will cause rotation of the worm 45, andthrough engagement of the worm with the quadrant 63 on the bracket arm61 will cause the bracket arm to swing about the axis of the shaft 2|. in

It will be understood, of course, that the length of the stroke of therack 48 will be such as to produce sufficient rotation of the worm 45 tocause the bracket ,arm 6! to swing through an arc of 90 and therebycause the crank I I to be retarded exactly 180 with respect to therotation of the shaft 2 i.

It will also be understood that this retarding of the crank ll must beat a uniform rate and that the 90 swing of the bracket arm 6| about theaxis of the shaft 21 must occur during the time period required forone-half revolution of the drive shaft 21 and at an average speed equalto one-half the angular speed thereof. Or, in other words, theretardation of the crank ll must occur over the time period for one-halfrevolution of the normal crank operation. This is necessary to hold thewire gun in a stationary position during the pause or dwell period, asshown in the diagram of Fig. 4. The operation of the air cylinder 49must, of course, be precisely con trolled to occur at exactly the righttime when the winding of the outer coils of the first poles of thestator has been completed. As before mentioned, this timing iscontrolled by a suitable cyafter the wire gun-has performed apredetercontinuously operating part of the winding maole-countingcontrol mechanism, not shown, de-

chine. The control for the intermittent operation of this clutch may bethe same as that employed for the control of the indexing clutch 38.Therefore, since the means for actuating the bracket arm 6| may be ofany'suitable former construction, I have no intention of limiting myinvention to the particilar means which may be employed foraccomplishing that purpose.

When the winding of the stator coils has been completed the windingmachine is stopped and the stator is removed from the fixture illjwhere}upon the winding reverse mechanism is returned to its initial positionby return operation of, the air cylinder 49. A new stator to be wound isthen mounted in the fixture and the wire gun, and the associated machineparts are set in proper starting position by means of the hand wheelshown at the right side of Fig. 1. v

In the event a mechanical clutch means, such as the single turn clutchbefore-mentiohedjifs employed for actuating the wire gun reversingmechanism, instead of the air cylinder 49, then agear having a fulltooth circle may be employed on the bracket 6|, instead of the quadrantor gear segment 63, and the bracket ,movement 1 need never be reversed.In such case the gear will be located to clear the path of the'bracketGland the bracket will always be shifted, in one direction only, inincrements of of angular movement. This arrangement will permit thewinding of a stator having more than four poles and, therefore,requiring more than one dwell" period in the wire gun operation.

shown and described as windin 'a 4 pole-islet stator it will beunderstood that the mechanism may also be used to wind a 4 pole, 6slotstator,

in which three coils are provided for each pole. In sucha case the onlychange in the machine will be in the span control mechanism whichisdescribed hi my aforesaid co-pending application. Also the sameprinciples of operation maybe embodied in the process of winding astator having six ormore poles, the principal changes in the windingmachine operation being in the fixture indexing mechanism and the spancontrol means, as will be readily uderstood by those skilled in thisart. The main advantages of this invention resid in the simplicity ofthe wire gun construction and operation; and in the fact that thewinding of the stator may be done in one continuous high speed operationwhich is wholly automatic from beginning to end. Other advantages willbe found in the high degree of acuracy in the operation of the mechanismand in the factthat the human factor is obviated in the actual coilwinding process.- r 3 Although but one specific embodiment of, thisinvention is herein shown and described it will-be understood thatnumerous details of the ,construction shown may be altered or omittedwith age-mete 11 departing from the spirit of this invention as "definedby the following claims,

'I claim: *1. In a coil Winding machine, the combination of a wire gunmounted for reciprocating 'moveend'of one wiregun'stroke, and means foractu- "ati'ng the last named means.

2. 'Inacoil winding machinenomprisin'ga wire gun mounted for"reciprocating stroke movement "along a predetermined path, rotary meanshaviiig "a crank connection with said wire gun ior 3. In 'acoil windingmachine comprising a wire un' mounted L'for reciprocating strokemovement faio'ng a predetermined path, rotary *means havirig acdnnectionwith said wire gun for frecipr'o- "dating said wire-gun in successivecycles or simple harmonic motion, a continuousiy rotating drive shaft, ad'rivi'n'g connection between said shaft "aridsaid'rotary meansincluding-an epieyciic-"g'ear "'tiai'n adapted to transmit motion'irom'saidshaft to *said rotary means, said gear train being mounted for'ang'u'lar movement about "the axis a of said shaft, and adapted'toVarythe-speedratio iie'tw'een saiu'sHa'ft and-rotar'y means uufing suchmovementfand means for shifting said gear train "s ngularly about said*sha 'ft, said means normally -'h61dfng-said gear train stationa'ry.

-4. 'In a "coil winding machine comprising a Wife @1111 mounted "forreciprocating "stroke movement along; a predetermined path, "rotaryfineans fhavi'ng *a "connection with said wire gun for "reciprocatingsaid w'ire gun in successive cydl'es dr 'sirdple harnionicnrdtion,acoritin'uously rotating anv than, a driving connection between Said'Shaftahd"saidrotarymeans including an epioyire gear tr'ain adapted to-tr'ansmit iiiotion from saidshaft to said rotary rrieana said geartrain being mounted for angular movement ibdiitthe aids of -saidsha'ftfand adapted to'vary ine *sp'e'eh *ratio between -said share androtary "means during such movement, and drive 'me'ans Tor shrifting said=g'e'ar 'train through *a predetertnine d distance an'goiany about *saidshaft ito *varytheraieuonn angular rlationof said shaft and said rotarymeans by a predetermined amount, 'saiddrive means nofmaiiy hildin'gsai'd gear tfain statiohary.

5. In a coil winding machine comprisi'ng 'a wire immoiiritedforreciprocating movemena adrive ine'ai'm "for reciprocating "said 'gunin continuous "yEles -of s'in'iple *harmonic motion, an intermittr itlyoperated means for turning -said wire gun "in aliz'erriiate directionson its axis or reciprocation during resp'ecti-ve half-cycle perio'ds infea'c'h normal cycle of wire gun reciprocation, differential mechanismincludedwith said-drive means and operable thereon to retard thereciprocating movement of said wire 'g'un during a half-cycleintervalo'ccurring'between two successive ones :or said periods, andmeans for operating said differential mechanism.

6. 111a coil winding machine oomprising a wire "gun mounted forreciprocating movement, a drive means '-'for reciprocating said wire:gun v in "continuous uniform cycles of simple harmonic motion, andintermittently operated means for turning said-wire gun in alternatedirections on its 'axis of reciprocationduring respective hal'fcyc'leperiods in each normal cycleof wire gun "reciprocation, means includedwith said drive means *ope'rab'le to #stop the :recipro'cating-m'ovement of said-wire gun during a ha'lf-cycle interval occurringbetween two successive ones of said period's, and means for actuatingthe last natmidm'e'an'sv '1. *In aicoil windin'g machine comprising :awire gu'n mounteu' for reciprocating movement, a

drive means for reciprocating said wire igun in continuous uniformcycles or simple iharmo'nic motion, and uniformly operated intermittentmeans for turning said wire I gun in alternate 'diretions -on its axisor -re'cipr'ocation during the middle andend periods respectivly-of eachnor- "mal cycle of wire igu'niop'eration, means-included with said drivemeans operable to stop the Ireciprocating -rn'ov'em'ent "of said wiregun during a half-cycle interval Ioccurring :between two suc- "cessiveon'es 'of itsturning movements,rand means to actuate the l'a's't "named:means.

8. ln' a'coil windingmaehinecomprising a wire gu'n mounted forreci'procatin'g movement, :a driven means (for reciprocating Jsaidwiregun in -continu'ous cycles of -simple :harm'onic fmotion, and' 'meansfor turning said wire gun in alternate direction on its axis ofreciprocation during the middle-and :endperio'ds respectively of eachcycle,

' a c'ontinuously rotating drive'shait 'aseeondshaft"having-drivingconnection with said driven means and aligned end to endwith-said drive shaft, can epicyclic gear train mounted for rotationiabout the common axis or sai'd shafits and having a driving connectionwith "the "mutually adjacent ends dfsaid shafts, said gear trainbeingLadapted to var-y'the speed of said -se'con'd shaftirelativetosaiddrive shaftwherrrotated aboutthe axis there- :drmeam ior rcitatingsaidgear train inthe direction to retard the speed of said second:shaftand 'ciis'place' the same through 'a predetermined angulardis'tance :relative to said drive shaft, and means to actuate the lastnamed means.

'9. .-'In a -'coil winding machine comprising ta 'wire gun mounted'fo'rreciprocating movementga driven 'means for reciprocating I said wire-gun in =con'tinuous'cye1es of simple harmonic motion, and continuouslydriven means for turning sai'd'wire gun in alternate directions -on itsaxis of reciprocation during the middle and end periods respectively "ofeach cycle, aeontinuously rotating drive 'shaft, a second shaftconnected to-said driven me'ans and aligned end to-end with-said-driveshaft, 3.11 epi'cyclic geartrain mounted at th'e adjacent ends ofsaid shafts for rotationabout theic'ommon axis of :s'aidshafts andconnected at each end to a respective one or "said shafts, :said'gearitrain *being adapted to vary "the speed or "said gshafitsrrelative to each other whenrotated ab'ou t the common axis thereof,meansrror rotat- THADDEUS F. HARVEY.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date Diehl Mar. 8,1921 Gysel Oct. 17, 1922 McC'ord Aug. 12, 1924Jannel Dec. 28, 1926 Klocke Jan. 14, 1936 Ammann et al. Apr. 16, 1940Carpenter July 27, 1948

